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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

W5ZIO callsign genealogy

Currently held by Walker, William U

The FCC publishes a previous_call_sign on every amateur license — a self-link to the licensee's prior callsign. Following those links produces the chain below.

Previous callsigns

Older callsigns held by W5ZIO's current licensee, walking backwards.

  1. WV7Gactive· E
    Patrick, Robert EWAgranted 2015-05-29
  2. W7EXCcancelled· E
    Patrick, Robert EWAgranted 2014-01-15cancelled 2015-05-29
  3. KD7UAAcancelled· T
    Patrick, Robert EWAgranted 2003-01-15cancelled 2004-02-18

Successor callsigns

Callsigns held now by people who previously held W5ZIO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W5ZIO, oldest first.

  • WALKER, HOWARD L TX
    1995-11-28 → cancelled 2007-11-29
  • Walker, William U AZ
    2018-12-21 active
← Back to W5ZIO License history →